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5 .E E V A R D E B SIPTNG APPARATUS.

Patented? Deo. 1o, 1895.

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SIFTING APPARATUS.

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SIPTING APPARATUS.

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SIPTING APPARATUS. No. 551,309, Patented Dea, 10, 1895.

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N5. 551,309. Patented Deo. 10, 1895.

DIN I GIMIHFHDTGUHOONMSMINWIJL. I.

UNITED STATEs EMIL R. DRAVER, OF

PATENT OFFICE.

ALLIANCE, NEBRASKA, A-SSIGNOR TO FLORENCE N.

DRAVER, QF SAME PLACE.

SIFTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 551,309, dated December10, 1895-.

Application led August 3, 1895. Serial No, 558,101. (No model.)

To al?, whom it may concern;

Beit known that I, EMIL R. DRAVEE, a citizen of the United States,residing at Alliance, in the county of Boxbutte and State of .Ne-

braska, have invented a new and useful Iml' provement in SiftingApparatus, of which the following is a specification.

The primary object of my present improvement'is to provide, principallyfor milling purposes, a sifting apparatus involving a number ofcontrollably-intercommunicating sections or compartments, to enablediiierent materials or kinds of material to be operated on and to bemixed in the sifting operation according tothe desire of the operator.

Referring to the accompanying drawings, Figure l is a plan view of myimproved sifting apparatus with the top or cover removed; Fig. 2, a viewof the same in side elevation; Fig. 3, a section taken at the line 3 onFig. l and viewed in the direction of the arrow; Fig. 'l, a'sectiontaken at the line 4 on Fig. l and viewed in the direction of the arrow;Fig. 5, a section taken at the line 5 on Fig. l, viewed in the directionof the arrow, and showing by a dotted representation a modifiedconstruction of the cover; Fig. 6, a view like that presented by Fig. lof my improved sifting apparatus containing a modified construction;Fig. 7, a section taken at the line 7 on Fig. 6 and viewed in thedirection of the arrow; Fig. 8, a section taken at the line 8 on Fig. 6and viewed in the direction of the arrow; Fig. 9, a view like thatpresented by Fig. l, but show ing another modified construction of theapparatus; Fig. 10, a section taken at the line l0 on Fig. 9 and viewedin the direction of the arrow, and Eig. l1 a section taken at the line11 on Fig. l and viewed in the direction of the arrow. Eig. l2 is a viewlike that presented by Fig. 5, but showing the cover in clined.

Referring particularly to Figs. l to 5, inclusive, A is a rectangularbox provided near each of its four corners with a button -r at which tosuspend it from overhead by cords 7", or the like; and for impartingdesired motion to the apparatus to cause it to perform its siftingfunction any of various means may be provided, the means showncomprising a stand B, in which is journaled an upright 4side of the box.

rotary shaft q carrying a belt-pulley q and, at its upper end, a crankq2 engaging the 4bottom of the box A at a pin g3 near its center.

The box is divided along its horizontal center by a partition O, whichextends short of the ends of the box to leave passage-ways about itsopposite ends.

C', C2 and G3 are transverse partitions, two of which extend from oneside of the partition C, toward its ends, to the adjacent side of thebox, and the other transverse partition C3 extends from about the centerof the opposite side of the partition O to the adjacent Thus'onecompartment, D, is formed between the partitions C and O2, another, D',between the partitions C2 and C3, and a third, D2, between thepartitions (l3 and C. Inlet-openings p are provided in the boxcover A',through which to feed the material or materials to be sifted.-

I find that in practice it is desirable to slant the box-cover, asindicated in Fig. 5, and clearly represented in Fig. l2, to form apocket or contraction in the passage along each side of the sitter,which causes the material to travel better. In the several compartmentsare screens E, E and E2, each of which inclines slightly upward from itspart adjacent to the feed-inlet leading to it, to the transversepartition at the opposite end of the compartment, and along the highersections adjacent to transverse partitions the several screens are ofcoarser mesh, as shown at fo, than throughout the remainder of theirextents, the coarse sections being provided, underneath them, withchutes o', each ot which leads through an opening o2 in a side of thebox, and equipped with a slide-valve 'v3 to a discharge-spout o at thatside.

The bottoms o, o and 02 ol the compartments D, D and D2 incline parallelwith the screens therein and afford conveying-bottoms, and in each ofthe bottoms, at its Vlowest point, is a dischargeopening n leading to aspout n and provided with a slide-valve n2.

In each of the transverse partitions Q', C2 and C3 there is provided,above the screens, an opening m covered by a hinged valve m, and in eachsaid partition below the screens there is provided an opening Z coveredby a hinged valve l', the valves Z and m having IOOv the handles Z2 andm2, respectively, projecting beyond one side of the box A, where each ispropped in its raised or lowered position by a pin :t adjustable ineither of the two holes ou suitably located to receive it.

The material to be sifted in each compartment is introduced upon thescreens therein, at their lower ends, through the inlets p, and themotion imparted to the apparatus by rotating the shaft q works it uponthe screens to cause the flour to pass through them upon the bottoms 0,o' and o2, whence it may discharge through the outlets n, and to causethe coarse product, or tailings, to attain the coarser-meshscreen-sections, through which they pass into the discharge-outlets r4.

Vhen it is desired to mix any of the material or materials of one ormore of the *compartments, one or more of the large-mesh screen-sectionso may be covered by any suitable means to prevent the passage throughthem of the coarse material, and with one v.or more of the valves mfopen this coarser maferial may pass from .one compartment into anotherthrough the openings my. Similarly when it is desired to mix the productof sifting through the finer mesh of a-screen, which falls .on a bottomyo, 0 or o2., with the product on the bottom of either end of the othercompartments, it is only necessary to close the proper valve or valvesa2 and open the valve or valves Z to produce intercommunication of thecompartments below the screens, thereby causing the material to passfrom one compartment to another until the outlet which has been leftopen is reached.

It will be noticed that the feed and discharge ends of the varioussections are adjacent to one another, with the feed ends of the screensand bottoms lower than the discharge ends thereof, to prevent any of thematerial from one compartment passing out with the tailings from theadjacent section.

The construction illustrated by Figs. G, 7 and A8 differs from thatshown in the preceding figures in having the screens E, E and E2 and thebottoms 0 o' and 02 mainly hori- Zontal but inclined abruptly upwardtoward their discharge ends. Thus, as seen in Figs. 7 and 8, thecoarse-mesh sections t' are horizontal, and on a higher plane than theVfinermesh portions of the screens, which abruptly incline upward tojoin them, and the bottoms o, o and o2 turn abruptly from the horizontaland incline upward to the opening Z.

According to the construction illustrated in Figs. '9, 10 and ll, thebox A 'has provided in it a rectangular partition open at one end anddivided along its `center :by a partition C4, which extend-s from oneend of the box to the other. Thus two compartments D4 and D5 are formed,in the nature of channels, the former extending from .an inlet 29 in thebox-.cover along the outer side of the vrectangular partition C5 andabout the end back along the inner side, and the channel D5 eX- tendingfrom the inlet 19 in the cover along the inner side of the rectangularpartition and about the end thereof back along the outer side. Thecompartments D4 and D5 contain screens E* and E5 inclining from theinlets to the mouths of the outlets t5, where the screen is of coarsemesh, as indicated at o, to permit the tailings to pass through. Thedischarge-outlets n3 for the flour which sifts through the screensextend from the bottom o4, which in this construction is shown hori-Zontal for both compartments. In the partition Ci are the openings m2and m3, respectively, adjacent to the coarser-mesh sections r in thecompartments D4 and D5 to render them intercommunicating, and below thescreens in the same partition are provided the openings Z2 and Z3 torender the compartments there intercommunicating, -all for the purposehereinbefore described. These open-ings may also be provided withvalves, though .all valves are omitted from the illustration of themodified `constructions to avoid confusion.

The operation of the modification last described is precisely the sameaS that of the construction represented by Figs. 1 to 5 inclusive.

Thefdetails of construction of my improved sifting apparatusshown anddescribed are the best known to me. They may be variously modified,however, and the construction may be amplified, as by providing a seriesof the sifters one `above the other, without departure from myinvention.

What I claim as new, and ldesire to secure by Letters Patent, is-

1. Ina sifting apparatus a `bor adapted to be suspended and providedwith mean-s for imparting to it the sifting motion, said box beingdivided into intercommunicating compartments provided with dischargeoutlets for the si-fted product, an inclinedcover provided with one ormore feed-.inlets for the said compartments., a screen ineachcompartment eX- tending between its bottom and said cover andforming a pocket with said inclined cover and havinga finer-mesh sectionand a coarsermesh section, and discharge-outlets for the tailingsleading from said 4coarser-mesh sections, substantially as and for thepurpose set forth.

v2. In a sifting apparatus, ya box adapted to be suspended and providedwith means for imparting to it the sifting motion, said box beingdivided into intercommunicating compartments provided withdischargeeoutlets for the sifted product, a cover provided with separatefeedinlets, one for .each compartment, a screen in each compartmentextending between its bottom and said cover an d inclining upward towardthe dischargeend of the compartment, said screen having aiiner-mesh-section and a .coarser-meshsection `at the higher end, anddischarge outlets lfor the tailings leading from said coarsermeshsections, substantially as and for the purpose set forth.

3. In a sifting apparatus, a box adapted to be suspended and providedwith means for lOO IIC

imparting toit the sifting motion, said box being divided intocompartments intercommunicating through openings provided above andbelow the screens therein., valves at said openings, aording means foropening and closing, at will, said compartments to each other, dischargeoutlets for the sifted product from said compartments, a cover providedwith feed-inlets leading to the compartments, a screen in eachcompartment extending between its bottom and said cover and incliningupward from the inlet to the discharge-end of the compartment, saidscreen having a finermesh section and a coarser-mesh section at itshigher end, and discharge-outlets for the tailings leading from saidcoarser-mesh sections, substantially as and for the purpose set forth.

ai. In a sifting apparatus, a box Aadapted to be suspended and providedwith means for imparting to it the sifting motion, a partition C andpartitions C C2 C3 in said box dividing it into compartments D, D andD2, a cover A on the box provided with feed-inlets p, inclining screensE, E and E2 in said compartments having coarser-mesh sections t at theirhigher ends, openings m and Z in the transverse partitions respectivelyabove and below the screens and provided with valves fm and Z', bottomso, o and o2 for the compartments inclining parallel with the screenstherein and having discharge-outlets n provided With valves n2, andvalve-controlled discharge-outlets leading from underneath thecoarsermesh screen sections, substantially as and for the purpose setforth.

5. In a sifting apparatus, a box adapted to be suspended and providedwith means for imparting to it the sifting motion, said box beingdivided into intercommnnicating conlpartments, an inclined screen ineach compartment, an inclined cover above the screens provided with feedinlets, and forming a pocket along a side of the sieve for enhancing thetravel or the material and an inclined bottom belovvr said screenprovided with a dischargeoutlet, substantiallyT as and for the purposeset forth.

EMIL R. DRAVER. In presence olf- H. V. SGHAUPP, F. W. SCHAUPP.

